Issues

• [Question] Is McpServerHandlers.CallToolWithAlternateHandler appropriate for InputRequiredResult

  modelcontextprotocol/csharp-sdk#1902 · Filter by author alzimmermsft opened on Oct 2, 2026

• SDK 2.2.0 - McpClient.ServerInfo throws when optional 2026-07-28 serverInfo metadata is absent

  bug
  modelcontextprotocol/csharp-sdk#1901 · Filter by author anushree1808 opened on Oct 2, 2026
  1

• ClaimsPrincipal parameter injection sample request

  modelcontextprotocol/csharp-sdk#1899 · Filter by author hansmbakker opened on Oct 1, 2026

• Tools registered with WithTools keep a disposed service provider in memory

  modelcontextprotocol/csharp-sdk#1898 · Filter by author yasmoradi opened on Sep 29, 2026

• JSON property-name casing is inconsistent between JSON-RPC envelope and request params

  modelcontextprotocol/csharp-sdk#1897 · Filter by author nagavitalp opened on Sep 28, 2026
  1

• Resource template with several comma-separated variables in one expression binds the whole value to the first variable

  modelcontextprotocol/csharp-sdk#1896 · Filter by author Laurianti opened on Sep 28, 2026

• Stdio client on Windows: dispose returns before the server tree exits, and a request sent during dispose never completes

  modelcontextprotocol/csharp-sdk#1894 · Filter by author MarcelRoozekrans opened on Sep 27, 2026
  1

• copilot-instructions.md references McpServerFactory, which was removed in #985

  modelcontextprotocol/csharp-sdk#1893 · Filter by author Zir0-93 opened on Sep 26, 2026

• [Proposal] Declarative tool registration & runtime filtering for version gating (#1557)

  modelcontextprotocol/csharp-sdk#1881 · Filter by author ump45nose opened on Sep 17, 2026

• MCP Client: Add bounded connection-establishment recovery with end-to-end timeout and closure guarantees

  enhancement
  modelcontextprotocol/csharp-sdk#1879 · Filter by author anushree1808 opened on Sep 16, 2026

• csharp-sdk graded A (93/100) on OpenTrustBench, badge inside

  modelcontextprotocol/csharp-sdk#1871 · Filter by author gautamkishore opened on Sep 11, 2026

• MCP Protocol-Version Ceiling for the C# Client SDK

  enhancement
  modelcontextprotocol/csharp-sdk#1868 · Filter by author anushree1808 opened on Sep 11, 2026

• Document ClientOAuthOptions.ScopeSelector usage

  modelcontextprotocol/csharp-sdk#1867 · Filter by author z0rimo opened on Sep 11, 2026
  1

• Support explicit OAuth authorization when MCP initialization succeeds anonymously

  modelcontextprotocol/csharp-sdk#1866 · Filter by author Aaronontheweb opened on Sep 10, 2026
  2

• Configure McpServerToolCreateOptions via WithTools

  enhancement
  modelcontextprotocol/csharp-sdk#1865 · Filter by author adrianm64 opened on Sep 9, 2026
  1

• Add support for the Skills extension (SEP-2640)

  modelcontextprotocol/csharp-sdk#1863 · Filter by author PederHP opened on Sep 9, 2026

• StreamableHttpClientSessionTransport loses a correlated JSON-RPC error in a chunked HTTP 200 response

  bug
  modelcontextprotocol/csharp-sdk#1862 · Filter by author anushree1808 opened on Sep 8, 2026
  1

• Stateful connection is intermittent.

  bug
  modelcontextprotocol/csharp-sdk#1861 · Filter by author khteh opened on Sep 8, 2026

• .net 9 targeting .net 10 packages

  modelcontextprotocol/csharp-sdk#1859 · Filter by author sleepydog999 opened on Sep 7, 2026
  2

• ElicitAsync<T> throws where the untyped ElicitAsync succeeds under an outgoing-request interceptor

  modelcontextprotocol/csharp-sdk#1854 · Filter by author ConnorMoss02 opened on Sep 4, 2026

• ProcessMessagesAsync's internal fire-and-forget task duplicates Completion's failure signal via TaskScheduler.UnobservedTaskException

  modelcontextprotocol/csharp-sdk#1851 · Filter by author aymericbouzy opened on Sep 3, 2026
  2

• SDK Client: ConnectAsync discover→initialize fallback unreachable when AutoDetect transport fails with HttpRequestException

  bug
  modelcontextprotocol/csharp-sdk#1848 · Filter by author anushree1808 opened on Sep 1, 2026
  1

• Serialization exception when invoking a tool with an array parameter

  bug
  modelcontextprotocol/csharp-sdk#1846 · Filter by author KubaZ2 opened on Aug 28, 2026
  4

• MCP Server is unstable when deployed to AWS AgentCore

  bug
  modelcontextprotocol/csharp-sdk#1842 · Filter by author JakubK opened on Aug 27, 2026

• HTTP+SSE client: POST responses are never disposed, leaking one connection per sent message

  modelcontextprotocol/csharp-sdk#1840 · Filter by author yalcinfu22 opened on Aug 27, 2026
  1